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Excelchem Laboratories,Inc. <br /> DTE Stockton,LLC Project: 2020 Annual Fly Ash Profiling <br /> 2526 W.Washington St. Project Number: 4700995195 Date Reported: <br /> Stockton,CA 95203 Project Manager: Genny Huffinan 04/10/20 21:34 <br /> Total Recoverable Metals-Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AAD0056-EPA 6010B <br /> Matrix Spike Dup(AAD0056-MSD1) Source:2004048-01 Prepared:04/07/20 Analyzed:04/10/20 <br /> Antimony 33.5 0.5 mg/kg 100 2.15 31.4 75-125 1.80 25 QM-01 <br /> Arsenic 108 0.5 100 12.6 95.6 75-125 2.15 25 <br /> Arsenic 108 1.0 100 12.6 95.6 75-125 2.15 25 <br /> Barium 453 0.5 100 365 87.9 75-125 6.10 25 <br /> Beryllium 87.8 0.5 100 0.089 87.8 75-125 0.307 25 <br /> Cadmium 92.4 0.5 100 0.862 91.5 75-125 0.913 25 <br /> Chromium 113 0.5 100 28.1 84.8 75-125 1.34 25 <br /> Cobalt 87.6 0.5 100 7.51 80.1 75-125 0.825 25 <br /> Copper 201 0.5 100 116 85.2 75-125 1.78 25 <br /> Copper 201 2.0 100 116 85.2 75-125 1.78 25 <br /> Lead 106 0.5 100 27.6 78.5 75-125 0.472 25 <br /> Molybdenum 86.4 0.5 100 2.19 84.2 75-125 0.499 25 <br /> Nickel 101 0.5 100 22.3 78.5 75-125 0.199 25 <br /> Lead 106 1.0 100 27.6 78.5 75-125 0.472 25 <br /> Selenium 87.7 0.5 100 ND 87.7 75-125 0.997 25 <br /> Silver 82.8 0.5 100 ND 82.8 75-125 1.17 25 <br /> Thallium 66.4 0.5 100 ND 66.4 75-125 0.211 25 QM-01 <br /> Vanadium 120 0.5 100 38.6 81.4 75-125 0.912 25 <br /> Zinc 346 0.5 100 260 85.8 75-125 3.50 25 <br /> Batch AAD0068-EPA 7471A <br /> Blank(AAD0068-BLKI) Prepared&Analyzed:04/10/20 <br /> Mercury ND 0.016 mg/kg <br /> LCS(AAD0068-BS1) Prepared&Analyzed:04/10/20 <br /> Mercury 0.219 0.016 mg/kg 0.200 110 80-120 <br /> Excelchem Laboratories.inc. The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 10 of 19 <br />